Window unit



June 2l, 1955 H. E. MILLS WINDOW UNIT Filed 00%.. 25, 1952 EF1-E5. Wjn

United States Patent WINDOW UNIT Application October 1952, Serial No. 316,379

2 Claims. (Cl. 20--56.5)

This invention relates to window units in general and has particular reference to a new and improved vdouble glazed window unit of the type adapted for use in an oven door or the like.`

A principal object of the invention is to provide a new and improved double glazed window unit for an oven door,

A further object of the invention is to provide a window unit of the type described which is simple in construction and easy to assemble.

Another object of the invention is to provide 'a double glazed window unit adapted for use in an oven door and provided with sealing means adapted to effectively seal the space between the two panels'of the unit and to provide a seal between the unit and the oven`door in which it is used.

Other and further objects of the invention will be apparent from the following description and claims and may be understood by reference to the accompanying drawing, of which there is one sheet, which by way of illustration shows preferred embodiments of the invention and what l now consider to be the best mode in which l have contemplated applying the principles of my invention. Other embodiments of the invention may be used without departing from the scope of the present invention as set forth in the appended claims.

in the drawings:

Fig. l is an elevational view of a window unit embodying my invention;

Fig. 2 is a fragmentary sectional view taken along lines 2-2 of Fig. l;

Fig. 3 is a fragmentary sectional view showing a moditied form of the invention; and

Fig. 4 is a fragmentary sectional view showing one step in the assembly of the unit.

A window unit embodying this invention is particularly adapted for use in a door such as an oven door or the like, and as shown in Fig, 2 the oven door may comprise spaced door panels and 12 suitably secured together and each provided with an opening 14 therein in alignment with the opening in the other door panel and each panel having an inwardly projecting flange 16 around the edge of the opening 14 therein.

The window unit may comprise a pair of spaced, parallel glass panels 18 having a continuous channel-shaped spacing member 20 between the panels at the edges thereot'. The spacing member 20 may be a die cast part if desired and the opposing sides 22 thereof project slightly beyond the peripheral edges of the glass panels 18.

A pair of continuous clamping rings 24 are provided for securing each of the glass panels 18 te the spacing member 20, and each of such clamping rings comprises a portion 26 seated on one of the panels on the surface thereof remote from the spacing member 20 and a portion 28 overlapping the edge of a glass panel 18 and one of the opposing sides 22 of the spacing member 20. The portions 28 are provided with a series of tabs 30 spaced around the periphery thereof and adapted to be bent over 2,710,994 Patented June 21, 1955 against one of the opposing sides 22 of spacing member 20 inorderto clamp a glass panel 1'8 to the spacing meinb'er 20. Each of the fourV sides of the clamping rings 24 may be provided with one or more of the tabs 30. The clamping' rings 24 may be made with the tabs 30 either lying in or bent slightly out of the plane of the portions 28 of rings 214 as shown in Fig. 4, so as to facilitate assembly of the unit,`and the tabs 30 are thereafter bent over against the spacing member 20 in the manner shown toprovide a rigid assembly with the glass panels 18 rmly seated against portions 26' of clamping rings 24 and against the spacing member 20.

The outer surface of portion 26 of each clamping ring 24 is provided with a continuous groove 32 'havinga continuous ring 34 'of asbestos or other suitablesejaling material disposed therein. The anges 16 of door panels lil' and 12 are adapted'to enter grooves 32 in'clarnping rings 24 and to sealingly engage the sealing material 34 provided in grooves 32 when the window unit is attached to the door panel as shown in Fig. 2.

ln assembling the window unit to a door, the panels 10 and 12 are disassembled and the window unit arranged in the opening 14 of one of the panels with the ange 16 penetrating the groove 32 and engaging the ring of sealing material 34 therein, the flange 16 and groove 32 properly locating the window unit within the opening 14 inthe door panel. i

The door panel 12 to which the window unit is first assembled is provided with a series of brackets 36 suitably secured thereto adjacent the'flange I6 and one of such brackets 36 may be' arranged 'at each of the'fou'r sides of the ange 16. Each of the brackets is provided with a clamping member 38 adapted to be secured thereto by a screw 40 and having an end 42 adapted to seat on one of the opposing sides 22 of the spacing member 20 in order to compress the ange 16 against the sealing material 34 and to rigidly secure the window unit to the door panel 12.

The other door panel 10 is then attached to the panel 12 with the iiange 16 thereof penetrating the groove 32 in the other clamping ring 24 and sealingly engaging the ring of sealing material 34 in such groove.

A continuous strip 44 of asbestos or other suitable sealing material is disposed around the peripheral edge of each glass panel 18 and conned between a panel 18 and the portion 28 of a clamping ring 24. A suiiicient amount of sealing material 44 may be provided to insure that the same will be slightly compressed by portion 28 of clamping ring 24 when the ring is assembled as shown.

It will be noted that the opposing sides of spacing member 20 project slightly beyond the peripheral edges of glass panels 18 and that the portions 28 of clamping rings 24 are slightly tapered and abut the ends of the sides 22 of spacing member 20. The rings 24' may be made with the portions 2S thereof disposed perpendicular to the portions 26 so that the portions 28 will be sprung slightly when assembled on to the glass panels and spacing member to thereby provide a tight engagement between rings 23 and spacing member 20 and suflicient compression of sealing material 44 to provide a good seal between clamping rings 24 and panels 18.

The sealing arrangement previously described effectively prevents the passage of any vapors into the space between the glass panels 18 and also provides a good seal between the clamping rings 24 and each of the door panels 10 and 12.

In the modification shown in Fig. 3 the construction is generally similar but the spacing member of Fig. 3 is made of a sheet metal stamping, as is the clamping ring 124, rather than by die casting as in Figs. 1 and 2.

Each ring 124 has a Hat portion 126 adapted to seat on one of the panels 18 and a portion 128 overlapping the peripheral edge of a glass panel and one of the legs 122 of the spacing member 120. The legs 122 of spacing member 120 also project slightly beyond the peripheral edges of the panels 18 and abut against the inner peripheral Wall of portions 12S of clamping rings 124, as in the previous modification. The overlapping portions 12S are provided with tabs 130 adapted to be bent over against legs 122 as shown in Fig. 3, in a manner similar to Fig. 2 modifications.

The clamping ring 124 is provided with a peripheral bead 132 between portions 126 and 128, and a continuous flange 134 adapted to lie in close proximity to the ange 16 of one of the door panels. The bead 132 and ange 134 define a channel 136 therebetween adapted to receive a continuous ring 138 of asbestos or other suitable sealing material similar to the ring 34 of Fig. 2. Fanges 16 on the door panels 10 and 12 are adapted to penetrate and sealingly engage sealing rings 138 when the window unit and door panels are assembled as shown in Fig. 3.

Sealing material 144 is provided between each panel 18 and its clamping ring 124 and such material may be slightly compressed by portions 128 of clamping rings 124, as previously described.

While I have illustrated and described preferred embodiments of my invention, it is understood that these i.

are capable of modification, and I therefore do not wish to be limited to the precise details set forth but desire to avail myself of such changes and alterations as fall within the purview of the following claims.

I claim:

1. For use in a door comprising spaced door panels having aligned window openings and each having an inwardly projecting flange around the edge of the opening therein; a window unit comprising a pair of spaced transparent panels, a continuous spacing member between said panels at the edges thereof, said spacing member being U-shaped in cross section with the free ends of the opposing sides thereof projecting outwardly from the base of said spacing member, a pair of continuous clamping rings each being substantially L shaped in cross section and having one leg thereof seated on the outer surface of a panel and the other leg surrounding the peripheral edge of such panel, said clamping rings having portions integral with said other legs engaging said opposing sides of said spacing member thereby to clamp said panels to said spacing member, each of said clamping rings having a continuous groove in its said one leg on the side thereof remote from said panels, and a ring of sealing material in each of said grooves, said unit being adapted to be secured to said doorpanels with said flanges of said door panels entering said grooves and engaging said sealing rings.

2. A window unit according to claim 1 including a continuous strip of sealing material compressed between the edge of each transparent panel and its clamping ring.

References Cited in the tile of this patent UNITED STATES PATENTS Re. 21,126 Axe June 27, 1939 2,123,093 Bowman July 5, 1938 2,319,004 Lotter May 1l, 1943 2,383,691 Smith Aug. 28, 1945 2,489,962 Hardwick Nov. 29, 1949 2,535,589 Mills Dec. 26, 1950 2,575,854 Verhagen Nov. 20, 1951 

